•Question 1   (1 point) The key difference
 between atoms of two different
 chemical elements is their number of 
   a.Electrons   b.Protons
   c.Neutrons    
  
 •Question 2   (1 point) The neutral atom of
 the most common form of
 hydrogen consists of
 •a.one proton and one neutron.   
 •b.one proton.   
 •c.one proton, one neutron, and one electron.  
 
 •d.one
 proton and one electron.
   
 •e.an isotope and an ion.    
  
 • Question
 3   (1 point) Two neutral atoms of the same element but of different isotopes contain the same number of
 •a. Electrons, Protons, and Neutrons   
 •b.
 Electrons and Protons but not Neutrons   
 •c. Electrons and Neutrons but not Protons  
 
 •d. Neutrons and Protons but not Electrons